That’s a tough one, maybe C&G holsters? Or Crossbreed? Seems holster makers don’t really like to get in the gun mounted light/laser IWB game because there are so many variations and you’re adding the optic and you want AIWB.
I found one for my S&W Shield Plus with an optic and a TLR-6 at Crossbreed but it’s a pancake holster not suitable for AIWB and I just got it because sometimes I want to mount the light to practice with it, I don’t carry it with the light.
I suspect most people are looking at mounted lights as either a duty holster thing or purely for home defense. There was a custom holster company I looked at awhile back Mernickel but I believe they stopped doing mounted light holsters.
Wish I could be of more assistance.